So I just finished replacing all of the rubber fuel lines in the back of the car. Not too bad- just no room to move around under there which was no surprise. The Spica mechanical fuel injection pump stays cool with flowing fuel- so most of the gas is just being circulated back and forth from the fuel tank, with a little skimmed off to run the engine. I bought new fuel line clamps as well for everything- but some of the ones I pulled off the car are excellent clamps so I just cleaned them up and reused them in a few locations. Here are the new lines up above the rear axle coming out of the top of the fuel tank (the feed line is the larger -1/2" i.d.). The smaller is the return line. Here is the electric fuel pump (mounted behind the right rear wheel) with new lines, clamps, etc ready for install). The brass piece is a line diameter reducer since the line from the tank is 1/2" i.d. but the connection of the pump is 3/8" i.d.. There was a plastic one in there ...